The overall feeling of this film is that of liberal propaganda posing as a revelation... essentially an act of a preemptive counter movement in anticipation of a repeat digital movement by right leaning parties.
And more obviously the lamenting of left leaning liberals that aided in data mining for Barack Obama then got contracted by Republicans and looking back only then get woke to the fact of how wrong data mining is when 'the other guys' use it.
The whole thing is interesting only to get a beginner's grasp on data utilization but is hardly the mindblowing exposé it is posting as.